Mathematics 10

Question

A lady invested a total of $5400 into 2 separate accounts. She invests 3.5% per annum and 10% per annum. After a year the total amount of interest is the same. How much did she invest in each account

Answer 1

Let x be invested at 3.5% and y at 10%

 

x + y = 5400

.035x = .1y =>  y = .35x

 

Substitute: x + .35x = 5400 => x = 5400/1.35.

 

You should be able to do the arithmetic from here.